Botary steam-valve



l EETTEE sTETEs PATENT oEEioE.

HERMAN HAUPT, OF CAMBRIDGE, MASSACHUSETTS.

ROTARY STEAM-VALVE.

Specification of Letters Patent No. 43,910, dated August 23, 1864.

To all 'whom t may concern Be it known that I, HERMAN HAUPT, ofCambridge, Massachusetts, have invented certain new and usefulImprovements in Balance-Valves, applicable to all kinds of,

engines operated by air, gases, or steam, and also to gas or watermeters, steam-hammers, drills, piledrivers, mining machinery in general,riveting-machines, and other pur poses; and I hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the accompanying drawings.

- The valve subject of this patent can be so constructed as to cut offat any portion of the stroke, it can b-e worked from an eccentric, arock-shaft, or an arm, or by a stud inside the cylinder moved by thepiston itself. It Canby a peculiar arrangement be made to shift'instantaneously when the piston has reached the end of its stroke, andnot by a sliding or drawing movement as in most other valves. It is thispeculiarity which renders possible the construction of a perfect watermeter tttfwillgnotipermit the escape of any portion of water withoutregistering it; the valve cannot shift until the stroke is fullycompleted and is then shifted by instantaneous action, the port beingentirely open either for one end of the cylinder or the other. Thefollowing is a description of the means by which these results areaccomplished: Figure 1, is a longitudinal section of the valve throughthe axis. Fig. 2, is a transverse section at the end A. Fig. 3, is atransverse section in the middle B. Fig. t, is a transverse section atthe small end C. Fig. 5, is a plan showing the springs for moving thevalve and the arrangement of the ports to supply the cyly inder.

means of two rings p, 0, p, p, which screw" The valve about to bedescribed is particularly applicable to a rock drill, but is alsoAapplicable to meters and other purposes.

The valve consists of a frustum of a coneV ground into and movingfreely, and steam' or air tight within another frustum which surroundsit. The valve is held in place by into the outer frustum or are adjustedby a screw from the outside which can be turned without removing thecap. They keep the valve perfectly tight as it wears, but pre,- vent itfrom binding in its seat thus affording a simple and perfect adjustment.

The ends of the valve at D and E, are

closed by caps which screw on the projections on the oiiter cone and tothese caps are attached the pipes which carry the live steam and theexhaust.

-If the live steam be admitted at one end as D, the exhaust must passout at the other lend E.

The exhaust quadrants E, E, are closed at the end D, and open at the endE.

The outer frustum is surrounded by a cylindrical steam chest F, F,divided in the middle transversely byY an annular partition Gr, formingtwo passages, one of which H, H, communicates with the right end of thecylinder, the other' I, I, communicates with the left end.

In the outer frustum there are four openings or ports, two of which, p,'70, communicate with the steam passages H, H, leading to the right endrof the cylinder, and the other two, p p communicate with the steampassages I, I, leading to the left 'end of the cylinder. 'The width ofthe ports is equal to half the throw of the valve, and the length equalor nearly equal to the width of the steam passages H and I.

In the inner frustum which is movable, there must be double the numberof ports or openings that required in the outer or fixed frustum;theseportsat the end of the cylinder D, are marked a' n n n, and at theend E are marked m "m m m. As the valve rocks in its rear through an arcof 45 these ports n n fn., two of which communicate with the steamquadrants S, S, and two with the exhaust quadrants E, E, are presentedalternately to theports p, which lead to and form the right end of thecylinder, while the ports m m m m, are at the same time y ways.

For steam drills, meters, and various other purposes, it is desirablethat the valve should be made without any external rods, arms oreccentrics, and that t-he movement should be instantaneous when thepiston has finished its stroke.. One of the devices for theaccomplishment of these objects will now be described.

On the under side of the movable frustum, Fig. 3, there are teeth whichwork in a movable rack 0, the extent of movement of the rack beingsufiicient to vibrate the valve 450. In contact with the rack piece o,are two rectangular pieces g, g, which are attached to rods. These rodspass through movable pieces t, furnished with stuifng boxes to excludethe steam, and turning downward into the cylinder are alternately moveda distance equal to the throw of the valve, by coming in contact withthe piston within the cylinder. Between the pieces g, and t, the valverods are surrounded by spiralsprings, the stiffness of which isregulated by means of the screws u, u, which slide the pieces t, t,

either way as may be required.

In Fig. in addition to the pieces g, g, t, t, are shown triggers o, fv,with light springs fw, fw, to keep them pressed gently against thepieces g, g.

The operation of the valve will now be described.

The piston being supposed to be at the end of its stroke at the rightend of the cylinder, the valve is thrown to the right, the ports n and pare opposite, and allow the steam from the quadrants s to pass to theright end of the cylinder to commence the movement to the left, at thesame time the orts m and p', o-pen communication with the left end ofthe cylinder for the escape of the exhaust. When the valve is thrown tothe left, the ports Z9, p, communicate with the exhaust, and p, Z9',with the steam quadrants. When the piston in its movement toward theright end of the cylinder touches the valve rod at this end it does notmove the valve, but simply compresses the spiral spring which surroundsthe rod. As the movement is continued the `piece g on the right sidepasses the projection ai,

lspiral spring instantly acting moves the rack 1 piece, and throws thevalve to the right side-opening the proper ports, and reversing themovement of the piston.

It will be perceived from thisdescription that the valve is not moveddirectly by the piston, but by the sudden release of a bent spring,making its action instantaneous-` `The blow upon the valve rod is veryslight, `for it is detached from the valve when "struck by the piston,and its office is simply to compress the spring and set the trigger ifor the next throw ofthe valve, while the valve itself is in equilibriumby the equal pressure ofsteam on opposite sides.

When a valve of this description is applied to engines` `which require acut off,

t-he valve is shifted by two movements, the first closing the steamport, and the second which must be twice as far as the first,

opening the steam and exhaust ports for1 the other end, and this cut olican be made 1 aljustable by placing the arm which throws i the valve, atdifferent distances from the ends of the cylinder. l

What I claim asniyr invention and desire to secure by Letters Patent is-An equilibrium valve constructed as described with reference to thesteam, gas, air or water induction and eduction open? ings or passagesand partitions for opera tion substantially as set forth.

In testimony whereof I have signed my name to this specification beforetwo subscribing witnesses.

I-I. HAUPT.

Witnesses:

JABEZ A. SAWYER, MICHAEL R. MULLEN.

